Means for controlling the operations of blast-furnace-charging devices.



No. 868,711. PATENTED 001 2, 1907.

B. R. SHOVER. v MEANS FOR CONTROLLING THE OPERATIONS OI BLAST FURNACE ICHARGING DEVICES.

APPLICATION IILEII JAIL 12, 1906.

2 SHEETB-SHEET 1.

No. 868.711 PATENTED 001?. 22, 1907. 3., R. SHOVER. v

MEANS FOR CONTROLLING THE OPERATIONS OF BLAST FURNACE CHARGING. DEVICES.Y

APPLICATION I'ILED JAN-12,1906.

' 2 SHEETS-SHEET 2.

UNITED STATES 3 PATE T FF E.

I BARTON R. YOUNGSTONN, OHIO. I

minus non CONTROLLING THE ornns'rro'ns or BLAs'r-s'u'nNson-cnsnomo'nnvrons.

35- per,,an upper'be1l {or gas seal),

Specification of Letters Patent.

Patented Oct. 22, 1907;

Application filed January 12, 1906- Sarial .No. 295,685.

. Figu'rel is a diagrammatic view showing the movahll 10 'partsptthefurnace whose operations are controlled,

and also the contact devices'actuatqd thereby and Fig. 2' is a wiringdiagram showing the electrical ,cin'

c'uits and connections, the various contact drums being shown indevelopment.

In the operation of blast furnaces, it is essential to the properworking of the furnace that a certain predeterinined cycle of chargingoperationsshall be per-f formed, each step of the cycle heiingdone atthe proper time, and only when all the predetermined stepshave beencompleted-.

' The object of this invention is toprovide effective andpractical'means whereby the operations of the va riouslmovable parts oiaiurnace lcharging device, or of any two or'more of such movable parts,may be so an tomatically controlled that theoperator is of necessitycompelled to operate them in a predetermirhed'order or cycle. J I

To thisend, my invention consists'broadly, in the, provision of meanswhereby the motive devices which actuate the moving parts of the"'charging devices are each rendered inoperative except at the times whenthe proper precedent operations" have-all been performed In thedrawings, 1 have sho my invention as ap-' plied to the control of theskip ti'cally niovable'distributer, in such a manner that the operationof each is made dependent'upon the proper relative operations of theothers;- but it will be readily understood that the invention is equallyapplicable to Q40 the control of any two or more'of these parts. I havealso illustrated the proper circuit closing devices and connections fora certain predetermined cycle of oper ations hereinafter described, butby changing thev ratios of. the'gears, or other connecting devices, bywhich "71;: the movable contact-carriers oridrums are actuated, or

devices are'eachprovided with a separate driving ,rnecharii'sm. l haveshown, and prefer to employ separate electric motors for this purpose,but motors or let, a revolvi'iig hop-- a main bell, and a ver cylindersactuated by steam, compressed air, or hydraulic power, may be used, ortwo or more of the demagnetic or friction clutches.

In connection with each motor I provide, in the arrangement shown,switch mechanism for opening and closing each circuit, the operation ofthis switch mechanism being controlled by circuit-making and breakingdevices, ,actuatedby the movable parts of the iurnace chargingapparatus, each such switch mechanism being controlled by the movementof one or more of the other iurnace hharging parts, and the circuitsbeing so interco nnected and interdependent that the circuit of any :particularirnotbr cannot be closed except upon the completion oiitheprecedent operations. I also preferably provide intihe-inotor circuitspilot or safety switches by which are further arranged to actuatecircuit-making and breaking device's interposed in the several comtrolling circuits, these devices acting to positively pre- .vent the,premature operation of any motor by reason he established)- Whenf steam,compressed air, or hydraulic-motors, or cylinders, are employed, in'lieuoi these pilot switches, the actuatinglevers or controlling handles ofthe motorsunay'be locked and released electro-magneticallygand e sameresults secured. And when the chargingparts are driven through clutchmechanism, the clutch inechanism be similarly controlled. v v

, My invention also ctinsitiis invthe novel construction, 'arrangementand combiner-Len of the parts all substantially as hereinafter describedand pointed, out in the appended claims. a 1 I In the drawings, Alldesignates .the furnace top, 41 the rotary hopper, 42} the upperohfsmall bell, '43 the lower ormain bell, 44 hoveriicallyniovahlo.distributerjand 45 the skip-car. 46 isthe'motoi'ior-actuating the skip, through the drurndfi a'nd cable. 46217 the motor for revolving the hopper 41," 48 the motor which the cable50. 51 is the motor which operatesthe lower bell through the crank shaft52 and cable 53. 54 is the motor which actuates the distributor 44through the crank shalt 55 and thecable 56. These are the usual lets A,'A Aand A" are respectively made. These four controlling switches, asshown, are all of substanvices may be driven from the same shalt by"means of which the motor, circ'uits\are ultimately closed, and

of temporary circuit conditions which might otherwise 'actuatesthe upperbell through the crank shaft 49 and lingswitches through which thecircuits of the controL' bychanging the number or position of themovable parts ol'a blast furnace of this type. contacts, or both, ,thecycles of operation and the steps A, A A and A, are the respective handswitches goingto make up the same, may be changed to suit the orcontrollers which are closed by the operator for op workof anyparticular lurnace 01' to vary the method 7 crating thcskip'hoist, therevolving hopper, the upper p50 ol chargingla ny one iurnace as may bedesired. bell, the main bell,'and the distributen';

' In carrying out my invention, the movable charging ES, ES", ES and ESare electromagnetic control- A tiallysimiler construction, and consisteach of three or four sets of fixed contacts, h mjyable switch m'einbercarrying cooperating contacts, mdjt o oppositely ar rarigegil solenoidsfor moving" the mov i t is member from v one sitionto the other. i

In e switchES, B. and O designate thetwosolerx? oids; E, D end I), thethree sets of fixed contacts, and 15 and 16 the two movable contactscarried by the movable member of the switch, the contactsYD and D",being located oppositely to each other and bridged by the contacts 16 inthe' respective positions of the movshlesr vitch member, and thecontacts E arranged to be bridged by the movable contact 15 in oneposi-, tion of such meinber. The contacts D, togetherwith the contacts16 control the hopper signal HS which is preferably an electric lamp,although it ma b eny suitable electrically op eratedsignal; The two conta'cts E, togethei" with the contactjlh, complete the circuit to the.controller A, and tlie two coixtacts D" f with the contact 16, controlin partthe circuit. of the coil of the pilot switcli'PS, for the slriljtj-fifiotoi' I lI Qthe switch ES't thefisged ,coiitctsjD with themovebliig cohtect l8 colitrol thegupper bell sig al the'fix' ed contectsE with the movable contact 1 7 col i 2fisplete thezcir cuit 0f theoilttollerAfi'hnd the two wil mm'D- withrthelin'o'dva lile contact18'controli1'115art z 'ofwthe hlfljirri'otor." 132 thaneretli-ei'solenoids whic uihyable. member of this switch.

"' mhgt'ehm lete the circiiitioi the main n: r 1 'Ihe fiiel-contacts andgthe lJIOYQlIl 19 complete the circuit of the meinbell con tact 2011'?the fuhctions hereinafter des has lso" an extra 'pair of-fi'xdl'contacts E when bridged-by the contsctjlil, complete cuitshereinafter described; B h'hdc are th e-atl lhi- V ing solepoidsfforthisswitch. v 40 In thhiswitchjlESt, the fixed contacts D witlithemovable Uhntact 22 controlr-tthe distributr si'gri'al DS. The fixdcontact E and the movable contact 2]. complete the gcircui't of thedistributericontroller A, and i the fixed contacts D wwith the-movablecontact 22" 15 f coh trol in part the circuit -of the magnet coil F ofthe pilot'switch PSiof the main hell motorl .,B* and C" ere.thesctuetingsolenoids'for this switch.-

i Erich the four switches, ES ESZ ES slid ES- hes; resistance R inseries with its controller, the purr twill" hereinafter sppeer. --.E9lchof the} 'th thecorresghiidingicontroller. The coil vmotorpilot'witch'lshasits coil in series w ite I? oi the switches ES and8 list the -ci'rc'hit of such coil cannot be closed h elitrirhenbothswitches er'ih'proper'bositioh.

Isa chntsct'd rurh geared i to or otherwise "actuated yolyiugfhOriper lliIi'SuQh a manner as to "'frevoliitioz s to every, thre 'ie ioluti ohsofthe Qsrried oli this drhm 'aregtliree contacts, 1", g 41%, s i ce ith'p'zirt iro 'n centertg centerflcdhtehts Il -and 1" degrees apmla -nd land 1 degrees contacts are srrang'edbridge relatively fixed a5; fingersHQ one of which coniiected to the mlehis E8 the fixed contacts D hhdihm'oir V ts'ctfingers K during the remaining one iourth revo- "lotion,the eifzpngementbeiii'gesflchthat one of these nectedto he othersidepithe fopen skip'operated Or1eo end il flbeiii siiaced 120 degrees of 180:

tact fingers 1 until after the corresponding engagements of the 'fingers'H. One finger l is connected to; one

side of the supply circuit, and the other firiger -is conr ected to thecoil 13 of the switch ES and toe contact er contact drum herejiigfteide- U a chhiscp fhhnyhihh is geared directly h .h

otherwise actuated hy; the main-shaft of the upper bellactuating motel-{18, so as" to imakeohe complete revolution e'el'ch timethebell opensand closes. This driim carries'e single contact 3 aireriged,:.in, oneposition of the druni, to bridge a pair coritaht fingers H one of whichconnected ol ehside of the supply circiiit ;th1 ough the solenoid'coil Cbfthe switch slid the misf t: which is connectedin series with the coilhf the pilotswitch PS of the small h n inotoi' 48.-' i

V is a third which is geared to enda'ctusted hy the main, shaft of theupper bell aet lrsiting' smaller/i8; u 7 g so,v as to make onerevolution for eachio'u'r complete opphe circqitoi the soliioid coil10hr the pilot swimh PS a ei stlohs of the hell. This'drum carries acontact '4,

which bridges'conta ct fih gers 1? during three-fourths tact 5 which isarranged. to-hridge a second pair of ash- .two contacts; 'but hqt hofliof them; 7 is always bridging onepeir of thefix'igers. Oneof the"fingers/I is-cenhe'c'ted ,"to one side of the line through thesolenoidcoil- .Bf of: the switchf ES" nected in" multiplew t hhefl fthe.ifif ger's 1.14 of V T as before described}. i'ndalso with the coil'Btzolled T.

end thotherfingerzl is conline thrdughfe horiiielly 'tchj'S hereinafterdesei iliedz 'd in multiple, with-the 1 W isethird drli n' geared to orothht-Wise ectuetcd by,

the upperfhellfniotor so as to riialge one coinplete revo- Iutioiiftoeac'hsei ei ;complete oiisratbns'lgf the be1l: This driuii chrriesfthreecomm-1,36,? er fditlgenanged' fi s t' ee'fisg m 7 a'ri'd egres latrangedtha t fia nd 7 siniultan usly ndge the iihgers t 1 "IF-and Marrd'imroediatelygeite V the cozitact 8 will bridge the ii'g to" bridgerespectively the three L5, M 'ax d N fThesbontact fingers 1L isconnected with "the @c'oi1 f-F bell motor Pi Ql, .BwitchPSiend thence toone sideof;

the' circuit, while the other of is connected? 3 to one of the contactsD? oitheswitcli Qhe-ofF -the fingers M is connected directly-to one sideoi. the V knit, and the-other finger connected tofth'e lowered, and theupper bell dumped without revolving the hopper. These operations arerepeated until-seven ,skip loads have been deposited on the main bell.'The main bell is then dumbed,- and the distributor, which has been inits lowered position, is raised. v The fog-egoing operations as a whole,ill-the same order sgp, then twice repeated, and the distrib uter isthen lpwered, 4 which completes the'c x l 1 4 The'diagrarn, Fig.- 2,shows-thejcoil O of the pilot switch PS energized, the skip-up-circuitclosed, except at the controller A, whose pilot lamp $8 is lighted. 7

Referring to the cycle of operations above set forth,

the operations are as followsz-The controller A is closed, the skiphoisted, discharged and lowered, The

lowering of 'the skip closes the contacts R and S and.

enorgizes the coil B of the switch ES. fThis moves the movable member ofthat switch over tdthe left, opening the contacts D and closing the.circuit at the contacts -D and E Closing D lights the hopper signsLHS,while closing the'.cir cuit.at E, completes the .cirouitpf the coil F ofthe-'hopper'motor pilot switch PS except-at the controllerA Thehsondleof the controller A is now lnoved to closed .,,position, which en"ergises the coil F and e-1oseE lie-pilot switch PS, thereby opening thes wi t ch G sml-stsii'ting the hopper motor. The drum'T revolves thehopper until its I contact l l-bridges the fingersH", therebyparalleling the contacts E ,-,the.resistanjce B. a drop inpotentiahy'vhioh in the energization of the coil C. This'coil then pullsthemovable switch mern-ber hack to itsorigin al: posi ion, opening thecircuit'at' *E and D andclosing i at D. At this time the contact 2bridges the fingers I.- Opening the circuit at-D extiriguishes the pilotlight HS; and opening the circuit at E"opensthe-circi1it of thecontroller A, which falls open gravity or -by'the action'o'i a spring.The closing of the circuit at Y energizes the. coil 13 of the switch ES,thereby actuating" the movable niernber of gthatswitch to close-the.cird'uit'at D and E -a'nd, open'. .it t'B *F.

.Closing the circuit at D? lights the pilot lamp bS torthe small bellcontroller, -'vt' 'hileclosing'the cit-- ,cuitst'E?"c1osesth,e circuitofthe coil F of. the small 'bell 'pilot motor. switch PS through thecontacts D' andg the "make and break switch o "This circuit however,still-open at'G. and at" the'controller A. ng the circuit st'l), opensthe circuit of theEoil cuts out the coil F- and therehgclpses thecircuit at G. The small hell can now bedurnped. Thi'sis done hy closingthe controller which energizes the [coil F 7 of the pilot switch PSthereby starting the small bellrnotor and openin'jhefswitchGh The drum Ure volves untilits jl ifict 3 bridk'i gflie fingers Ha'which energizesthe coilm and cruises the .openi'ngof the switch ES and B -ens E andclosing D5 Opening D ekti'nguishesthe pilot lamp b8, and opening the circuit at E opens the circuit of tl3l controller A Closingthe circuit atD?energizes the coil 0 of the pilot switch PS, which closes the skip-upcircuit and lights its ,pilot lamp SS. The. continued revolution ofthcdrum .U openslthe'circuit at H Whidi cuts out the coil F of the switchPS and closes (3 The has now revolved 90 degrees without changingcifcuit" 'the lpil'ot' switch PS. When the drum T has-re; volved'degrees, thecircuit'isg'broken at H,'whic'h ssh-71ithe contacts I andand the drum W has made one lieventh of the revolution, which opens thecon- N, without-anyeffect, however, at this time oti thecircuits. Theseoperations are now repeated {until seven loads have been dischslrged bythe upperhel l to the main bell, the 5 operations being the same asdescribed, except that when the drum V has revolved 270 degrees, thecontacts I? are open and the contacts K are closed thcreby energizingthe coil B sothat the little bell may .be dumped at this time withoutfirst revolving the hopper. As the srnall bell is dumped the seventhtime, the drurnW is making the last one-seventh'of its completerevolution; and the contact fingers L and M are closed by the contacts 6and 7. Closing L parallels the contacts D, and closing M energizes thecoil B of the 'a'thtt opening it'at D and E, Closing D lights the Ecloses the circuit for the coil F of the main bell motor pilot switch PSexcept at the controller A the contacts N and the switch-G..- As thedrum W com pletes its full. revolution, the contacts at M? and L areopened, and the contact at N is closed. The opening oithe circuit at Lopens ithe circuit of thecoil F and stpps the operation of the smallbell motor,- at the same tiffne closing the circuits; G The 'main hellcan now be -dumped, which is done by closing the handle of thecontroller This energizes the coil F of the pilot sw ch PS startingthcmain 'bell'motorfand opening causes theconta'ct 9 to close the circuitlat-Hf, thereby enefg'i z'ing the coil C -a'nd' actuating the 'witch E8.toopen the circuit at D and E- and' cl atD'dsnd E; Closing the circuitat completes the circuit oi the-coil F except at the porntsfifi E sind Gfi fiClosing the, circuit at E closes the circuit Y-hssnow r evolv x120degrecsfwhicli closes the cir- I circuit at I l'snergiies the coil B;which 'actuat'es the switchES .to close the contacts '1) and-E and-openthecimiit at- 4 closes the *clitcuit of the coil F of the t; switch ABS,ex'ceptiht the controller-AI, 'The which-starts the distrihutehmg'atbr,.snd-at thesaine time opens theswitch G Tho ilrfim Z now reirolves untilthe contacts 11 are closeiIby: the contact 12, thereby energizing thecoil C toretunt the switch ES to its iorm'erjposition, thus opening thecircuit of controller Ala d extinguishing the signal DS; When the drumZis revolved 180:deg'recs,which corresponds to raising cutting"outthe-coil F whichstops the distributer motor and closes theswi'tc h G.-

pilot signal BS for the main hell controller. Closing.

thecircuit at G". The druni X is now revolved, which or the bell lamp asexcept at the point D The drum- ;the dis'tributer, the'contacts H areopened, thereby:

switch ES, thereby closing the circuit et'D end-E ,cult'at 1 mm;thereeftelr'again opens it Closing the los ' the conisacts DP. c1.r"cu'it-at 'Dlightis the pilotjlsttfnp DS tor the distributor controller,and closing liter motor-maynow he-operhted for raising-the uter, Thisisdone'by olpsing the handle of the v ler A, thereby completingthecirciiit of coil E All of the foregoing operations are now repeated 1twice, and upon: the completion of .the second s'ubcycle, the oonmctjl'l of the drum Y closes. thecircuit at I, which makes itnecessary"to now lower the dis- -tributr' and thus complete the fullcycle: This re-.

motor, di'fiftlience to one side o the'iiuppiy circuit, and the finger Nlis connected directly to th e, other side hfrtli supply (ircuit. f i Xis a contact'riturn, which is geared directly to the main actuatingshaft [or the main hell, 'or which is otherwise actuated by the mainbell, to mskelone complete revolutipn to each complete operation of thebell. This drum carries s fcontact 9, which, in

I one position of the'drum, isjgarmnged toifbridge the contact'fingersH. One-finger H is odnnected to i one side-of the supply circuit throughthe magnet coil of the switch Es and the other one islconneeted to theother side of the circuit through the coil F of the main bell motorpilot switch PS, through the 'drum W and the contacts D of the switchES.

Y is a second contact drum, which is geared to, or otherwise actuatedby, the main bell operating mechanism to make one revolution to eachthree complete operations of the bell. This drum carries two contactslfl'and ll' s'paced 120 and 240 degrees apart, and

arranged to bridgecontact fingers I", one of which is connected directlyto one side of the supply circuit, and the other of which is connectedto the other side of the circuit through the coil B of the switch ES.

Z is a contact carrying drum, actuated by the, distributer, and makingone revolution to each complete movement of the distributor.- This drumcarries two contacts 12 and-'13 spaced 180 degrees between centers,which arearranged to bridge contact fingers H, one oi which is connectedto one side of the line through the solenoid coil G of the switch ES andthe other of which is connected to the other side 0 the line through,the solenoid coil F of the pilot switch PS of the dis 3 tributer motor.

(sil ca-true 'swithh-illitfi The skip-operated switch SR, beforereferred to, consists of a relatively fixed contact S and a movablecontact It, the latter carried by lever Q having a springq whichnormally holds thccontacts Rand S, separated. i P is a lover having ayielding end portion, and which is operated by the skip inovomeuttoactuate the lever Q on the down movement of th'c skip to close thecontacts S and R. The levers I aqd'Q are shown as having bevelcd Contactends, which will ridoi by each other; on the upward movemeut of thelever P, hut which on a down movement of this lever, will operate tomove the lover Q to cause the engagement of the outacts'lthndfi. Thecontact R is cormected to one side of the supply circuit, and thecontact S is' conncctud with-the solenoid coil llof the switch it?through the drum before dcscrihcd: I Since the cuorgizatiou of the coilB, in order to ac- "tuatuthe novnhl couiactslfi and 1G is necessary, in;

closing of it o the lioppefcOntrOlIQlA," the the skip caunot'slie run'up until t-he hopper and the small =bcll have oompliiterhlthelroperations.

The drum T, by 'crnrtrrjlllnfii'tihc-onorgization oi the "rite-mindsetslr fl and l",

cmr-tr'ols tho opening in tiate-circuit of thehoigtrdllcr-A' ot thehopper motor-5 'tuidewlsorsthrough the fingers l and-.-contac in":2" 2?,Icouju'notifm;with,thccontact after the hopper has completed itsrevolution, except st each, fourth operation of the bell, when it is notdesired to irritate the hopper. At this time the circuit oi the coil Bis closed through the contact 5of the drum V, independently of the drum'1.

The U controls the opening of the circuit of the upper bell controllerA, when the bell has completed its operation. The drum' W, through thecoil B nnd the switch ES, controls the operation ofthe main hell motor,so that the latter cannot be operated until after the upper bell hasdischarged a predetermined number, of' loads-411 the particulararrangement described, seven. This drum, by means of the contact 6 andthe fingers 11-, also provides means for closing the circuitlofthemagnet coil F of the pilot switch PS of thesrnall bcllnnotorindependently of the controller A of the small bell. Through the contact8 and fingers N it controls the'circuit of the coil F of the pilotswitch PS? of the main'bell motor. The drum X closes the-circuit of thesolenoid coil C of the switch ES to open the main bell controllercircuitafter each operation of the main hell. The drii rn Y controls theclosing of the distributer motor controlling circuit, so thatthe'distrihuter cannot e operated until'thermain bell has cointhe coil 0of the switch ES and of merit of the distributor. l I

. In the circuit of thecoil F of the upper bell motor pilo'bs'witch, areplaced the make and break switches G and G operated respectively by theplu'ngcrs of the solenoids of th'epilbt switchesPS and PS of the hoppermotor, and the nfin'n bell motor, so that the upper bell motor circuitcannot be closed unless the circuits of both these motors is firstopened, in the circuit of the coil F of the pilot switch PS the mainbell motor, are two similar switches G? and G operated rospcctivelybytho plungers of thepilot switches PS and PS, so that the main bolloperating circuit cannot be closed until the circuits of the upper bellundilistributcr-mi'r tors have firstfbecn opened. Thesc four make andbreak switches, ,GQG, G: and G act as guardsito provcnt the prematureoperation of the parts, whds'e circuits they control by reason ertemporary circuit conditions which inight otherwise occur.

F after each move" tions above described will he bc'st undorstmid hyreforcnce to the diagram shown in '2, in which Hilllli'illln'cction sare completely sliown. In this'diagr'nm. in order to avoid confusion,instead of carryingthc torm'inals'of-tho 'ous s'u'h .iiiifl to therespective sidrs of I 7' lino. l'fllii'v'c nirrrM-d t hc tor. ruinsoF'thdsei"sub-circuitswith the proper plus and r'ninus signs to indicatetheir proper connection to the main circuit.

The particular cycle of operations which is controlled by the specificapparatus illustrated is as follows :lhc skip is raised, dischargcd'nndlowered. and the hopper revolved 90 degrees; the upper bell is theirdumped. tlmskip ruiscdand lowered, the hopper revolved I dcgrcog'and.the upper hell dumped; the skip-is again .raiscd:and-lowered, the hopperrevolved 270 degrees.

Theprecise manner of making the various conncr' pleted its opeiation.The drums Z open the circuit of turns all the parts to their originalpositions except tire,-

drurus T and. V, which are at different angular positions, withouteffect, so far as the three-charge cycle is coircorned. j

it will be noticed that during the operation of the main hell the shipcan be hoist ed and lowered and the hopper revolved ready to dump thesmall bell, there being no interference at ihis time with the rnulorcircuits of these parts. Also after dumping the main bell, the raisingor lowering of the distributor can be done at any time while the mainbell is being again filled, thus saving time; but in the first case thelittle bell cannot be dumped until the main bell is closed, and in thesecond case the main bell cannot be opened until the distributor hasbeen put in proper position.

By keeping the controllers A, A A and A closed, or short-circuited, theforegoing operations, with the -oxce'ption oi the movement of the skip,or as many of them as may be desired, can be made entirely automatic. v

By changing the ratios of the gears or other connections which actuatethe various contact drums, and

by-the isubstit ution of drums heaving different arrangement ofcontacts, the cycle ofbperat'ion may be changed as may be desired or-anyparticular furnace.

Various means may .boempioyod ior'actuating the contact carriers lay themovements of the charging parts, and various forms of circuit-closingswitches may obviously be usedwitbout departing from the spirit andscope of my invention, since What I claim is:-

1. Blast furnace charging apparatus having a plurality or separatelymovubleparts, motive devices for actuating said parts. and controllingmeans for governing the operatlou oi. the motive devices whereby saidparts cannot be operated except in a certain predetermined cycle;substantlally as described. v

2. The combination with two or more blast furnace charging mechanisms,and separate driving means for actuating the same, of means controlledby the movement of said mechanisms whereby they can be operated only ina predetermined cycle; substantially as described.

3. The combination with blast furnace charging parts and motors foractuating the same, of means controlled by the operation or said parts,whereby said motors are inoperative except in a predetermined order orsequence in u definite cycle; substantially as described.

4. The combination with two or more blast furnace charging parts. andseparate actuating devices therefor,

of automatic menus for preventing the operation oi! the actuatingdevices, and charging parts, except in 31 predetermined order orsequence in a dciinltecycie; substan by the operation oi the movablecharging parts, l'udarranged to compel lhc operation of such parts Ina'pradetermincxl cycle.

T. The combination with lwo or morc'movublc lu'rnucc churning ports inluding a skip or hoist. rind scpurute menus for unlnuling such purls, nlirlcl-lrn-mngm-lic .\\\'ilvlu'- 'nlllj'fllilllg the circuits oil theactuating nachos. "the several switches having inierucpcndentconnections.

nnd means controlled by the movement of the charging in a certainpredetermined cycle, and

parts rind skip for controlling the action of the switches:

substnntlully as described.

H. The combination with two or more movable furnace vlci's for nvtuatiugthe sums. of electromagnetic switches 'comrolllnn the circuits or thedevices, interdependent circults for the said switches, and movablecontact deviccs actuated by tho moving furnace charging parts and bythesklpbr holul. for outomutlcally controlling the electromagneticswitches; substantially as described.

ii. The combination with two or more movable furnace charging mechanismsincluding a skip or hoist, lndmotors for actuating the same, orcontrollers for the motors,

electromagnetic switches controlling the circuits of the controllers,said swltch'es having interdependent circuits, and movable contactdevices actuated by the charging mechanisms and ship for automaticallycontrolling the switches and circuits; substantially as described.

10. The combination with a plurality of furnace-charging mechanismshaving related operations, of normally inoperative motors for actuatingsuch mechanisms, and electro-magnetic means controlled by the movementsof the mechanisms .for controlling the operations of the motors wherebythe said motors are rendered operative only in a certain predeterminedcycle; substantially as described. I

11. The combination with two or more furnace charging mechanisms,bavinga related operation, of motors for actuating such mechanismselectro-magneticswitches controlling the operations of the motors.movnblscontact devices operated by the mechanisms ifor controlling theaction 0! the switches to close the cisdu'its of the motors omaticsignals for indicating the proper time 0! operation of each mechanism;substantially as described.

12.'The combination with a plurality or'..blust furnace chargingmechanisms. and motors for: actuating such mechunisrus,-olfelectromagnetic switches for controlling the operations of the motors,inter-related circuits (or the swltchcs,,means actuated by themechanisms for controlling such circuits, and switches whereby theoperations or the said mechanisms must occur in a predetermined sequeuesand cycle, together with means for indicafing to the operator the propertime for the operation oteach of the mechanisms; substantially asdescribed.

13. The combination with two or more movable firrnace chargingmechanisms, and motors for actuating the some,

ot controllers tor the motors, electromagnetic switches controlling thecircuits of the controllers, said switches having interdependentcircuits. and movable contact devices actuated by the chargingmechanisms for autonr'st ically controlling 'the switches and circuits,together with normally open pilot switches in the circuits of the motonsand', controlled by the motor controllers; substantially.

described.

:11. The combination with two or more movable furnace chargingmechanisms, and motors for actuating the same,

ot'controllers for the motors, clec tro-mugnetlc switches conl. rollingi;he circuits of the controllersfsaid switches having interdependentcircuits, and movable contact dcvlce'sctuuted by the clrargipgmechanlsmstor auiomat lcsliy controlling the switches and circuits,pilot switches in the motor circuits. and iir'aks and break switches operated by the pilot switches and inserted each -in tha circuit oianother controller; substantially as described.

15. The comblnatlon'og charging mechanism It the ot a furnace, a skip'orhoist tor delivering stock mm and motors for operating said chargingmechanism and; whose operation is controlled by the movements -otskip orhoist and thereby rendered inoperative except upon the completion 01certain predetermined operations Olthq' slgfp or hoist; substantially asdescribed.

' 16. The combluutlomwltii charging mechanism a; the top of u turnncc, askip or huh-it for delivering stock then-el0. motors for operating thecharging mechanism and the skip or l olsi, iuid controlling devices forthe said motors having interdependent circuits, and means operated bythe said mechanism undthe skin or hoist. whereby the operation of themotor or motors lor'tlie charging mechanism is -Chrligliig partsIncluding a skip or hoist; and motive de controlled by the movement oithe skip or hoist, and the operation of the skip or hoist is controlledby tbe operation 01' the charging; mechanism substantially as described.

The combination with charging. mechanism at the top of a turns co; askip or hoist for delivering stock there to, motors ftir operating thecharging mechanism and the skip or hoist, and controlling devices forthesald motors having interdependent circuits, and means operated by thesaid mechanisnzr-and the skip or hoist, whereby the opens tion of themotor or motors for the charging mechanism is controlled by the movementof thef'sltip or hoist, and the pierution of the skip or hoist iscontrolled by'the operai'ou of the charging mechanism, together withcircuit con Vroliing meanswhereby the dillerent moving parts-of thecharging mechanism can be actuated onlyin 'a predetermined order orsequence; substantially as described.

184 in blast furnace charging mechanism, a small hell, a skip or hoist,motive devices for the bell and the skip or hoist, und interrelatedcontrolling mcchenlsm for said motive devices arranged topreventtheoperation of the skip or hoist except when the small bell is closed;substontially as described.

19. In blast furnace charging mechanism, a small hell. :1 skip ol:hoist, motive devices for the bell and. the skip or hoist, andinterrelated controlling mechanism for said motive devices arranged topreventthe operational the skip or hoist except when the small bell isclosed, and also to preventthe operation of the small bell until afterthe skip or hoist has discharged its load; substantially as de-'scribed.

20, In blast furnace charging mechanism, a small hell,- 2.

large bell, motive devicese for said hells, qnd interrelated controllingmechanism for said motive devices, whereby the large hell cannot beoperated until after the small bell has discharged a predeterminednumber of loads; suhstentially as described.

21; In illit st furnace charging mechanism, a small bell, a rot: yhopper, motive devices for said bell and hopper, and interrelatedcontrolling 'mechenlsm for said motivedevices arranged to compel theoperation of the hell and hopper in a certain predetermined manner;substantially as described.

22. In blast furnace charging mechanism, a rotary hop per, a small bell,a large hell, motive devices for the hopper and bells, and interrelatedcontrolling mechanism for the motive devices. arranged to prevent theoperation 0! said devices except in a predetermined order; substantiallyas described.

23. In blast furnace charging mechanism, a small bell, a large hell, adistributer, motive devices for the bell and distributor, andinterrelated controlling mechanism for the main bell motive devices forthe hell and distributor, and' interrelated controlling mechanism forthe motive devices whereby the distributer cannot be operated untilafter a certain predetermined number of operations of the bell;substantially as described.

26. In blast furnace charging mechanism, a blast fur noce charging part,a motor for operating the part, a'co troller for the motor, a pilotswitch in the motor and conLg trolle l circuit, and means whereby thepilot switch canuo be closed except under predeterminedconditions;substsn.- tially as described 4 1 In testimony whereof, I have hereuntoset my hand. BARTON R. SHOVER. Witnesses r BRADEN T. Gnmnsrw, 0 L.Bnnnnsr-ur.

